Léo Fitouchi
Research Fellow
Institute for Advanced Study in Toulouse
Toulouse School of Economics
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I’m a postdoctoral research fellow at IAST within the Toulouse School of Economics.
Next year I will join MIT and Harvard University as a Marie Skłodowska-Curie Postdoctoral Fellow.
I investigate the structure and function of moral cognition: Why do human minds produce moral judgments—mental representations about right and wrong? What is the computational architecture of moral cognition? How do these cognitive mechanisms shape the evolution of normative culture, including moral norms, religious traditions, and punitive institutions?
I address these questions by integrating insights from cognitive science (e.g., moral psychology), evolutionary biology (e.g., game theory), and the social sciences (e.g., socio-cultural anthropology). I test the theories I develop using behavioral experiments and cross-cultural databases.
Selected publications
Lie-Panis, J., Fitouchi, L., Baumard, N., André, J.-B (2026). Why human societies adopt rigid moral rules: the efficiency-robustness trade-off. PNAS, 123(28) [PDF]
Lie-Panis, J., Fitouchi, L., Baumard, N., André, J.-B (2024). The social leverage effect: Institutions transform weak reputation effects into strong incentives for cooperation. PNAS, 121(51). [PDF]
Fitouchi, L., André, J.-B. & Baumard, N. (2023). Moral disciplining: the cognitive and evolutionary foundations of puritanical morality (Target article). Behavioral and Brain Sciences 46, e293. [PDF] [Response to commentaries]
Fitouchi, L. & Singh, M. (2026). Retributive sentiments track both deterrent and compensatory concerns in a small-scale society and a WEIRD sample. Psychological Science [PDF]
Fitouchi L., Singh, M., André, J.-B., Baumard, N. (2025). Prosocial religions as folk-technologies of mutual policing. Psychological Review, 132(6), 1410-1437 [PDF]
Fitouchi L. & Nettle, N. (2025). Harmless bodily pleasures are moralized because they are perceived as reducing self-control and cooperativeness. Cognition, 262, 106154 [PDF]
Fitouchi, L., & Singh, M. (2023). Punitive justice serves to restore reciprocal cooperation in three small-scale societies. Evolution and Human Behavior, 44(5), 502-514. [PDF]
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